CVE-2026-15573 — Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs b…
Published: 2026-08-05 · CVSS: 8.1 · CVSS 3.1
A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should not have permission to see.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7